diff --git a/ChangeLog b/ChangeLog
index c8932fbf0f..6f0abf3ae7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Dec 22 19:14:38 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* process.c (rb_f_fork): Unsupport Kernel.fork() on NetBSD.
+
 Sat Dec 22 15:54:54 2007  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* test/ruby/test_transcode.rb: Added simple tests for
diff --git a/process.c b/process.c
index 525a546d6e..4268e33a25 100644
--- a/process.c
+++ b/process.c
@@ -1474,7 +1474,7 @@ rb_fork(int *status, int (*chfunc)(void*), void *charg)
 static VALUE
 rb_f_fork(VALUE obj)
 {
-#ifdef HAVE_FORK
+#if defined(HAVE_FORK) && !defined(__NetBSD__)
     rb_pid_t pid;
 
     rb_secure(2);